Prethermalization and persistent order in the absence of a thermal phase transition

Autor(en)

Jad C. Halimeh, Valentin Zauner-Stauber, Ian P. McCulloch, Ines de Vega, Ulrich Schollwoeck, Michael Kastner

Abstrakt

We numerically study the dynamics after a parameter quench in the one-dimensional transverse-field Ising model with long-range interactions (1/rα with distance r), for finite chains and also directly in the thermodynamic limit. In nonequilibrium, i.e., before the system settles into a thermal state, we find a long-lived regime that is characterized by a prethermal value of the magnetization, which in general differs from its thermal value. We find that the ferromagnetic phase is stabilized dynamically: as a function of the quench parameter, the prethermal magnetization shows a transition between a symmetry-broken and a symmetric phase, even for those values of α for which no finite-temperature transition occurs in equilibrium. The dynamical critical point is shifted with respect to the equilibrium one, and the shift is found to depend on α as well as on the quench parameters.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Ludwig-Maximilians-Universität München, University of Queensland, Stellenbosch University

Journal

Physical Review B

Band

95

Anzahl der Seiten

7

ISSN

2469-9950

DOI

https://doi.org/10.1103/PhysRevB.95.024302

Publikationsdatum

01-2017

Peer-reviewed

Ja

ÖFOS 2012

103024 Quantenfeldtheorie, 103036 Theoretische Physik

Schlagwörter

ASJC Scopus Sachgebiete

Electronic, Optical and Magnetic Materials, Condensed Matter Physics

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/f82d4b80-8ab0-4fbf-b3d9-2ccceb73a628